I'd like to know the same thing, please, albeit for slightly different reasons.

I bought Osmos HD and have greatly enjoyed using it, but thanks to the fact that Asus' buggy updates have made my Asus Transformer TF101 tablet hopelessly unstable, I want to move to playing on my HTC One X smartphone instead. Thing is, I've put in many hours of gameplay, and don't want to start over from scratch. Both devices are under warranty, so I can't root to use backup apps.

One way or another, I need to wipe my tablet soon. I'd like to be able to save my Osmos HD gameplay so I can do that. If I can't backup my data, I really can't see myself playing the game any more in the knowledge that my next wipe or hardware replacement will lose all my data again. Hence, I'm really hoping there's a way to do this, or a backup / restore function can be added...

At this time there is no way to extract the save game file from Osmos on an Android device without having root access to your device or installing a third-party app which gives you this access. If you'd like to go this route, the save file is located at this filepath: /data/data/com.hemispheregames.osmos/files/Osmos/Osmos.sta.

We're investigating ways to expose the save file for backup purposes, but we don't have an ETA for when this might be implemented.

The file location is also different on the 1.2 version vs 2.0 version (besides app-name difference):

1.2 - files/Documents/Osmos2.0 - files/Osmos/

also - when I had both installed, it looks like Osmos 2.0 access Osmos 1.2 files (the file dates changed and log file was written to). So I tried uninstalling Osmos 1.2 after copying the .sta - but no change :-/ still empty progress. Hm... trying copying the entire Documents folder now...